Even in modern, i'd wager you could totally find an air elemental who's electricity spec'ed to run grid web errands for you.
They exist. They also tended to be hunted down and forced to register with the government, because of the minor issue that is the ongoing war with the gods. Not to mention elementals in general tend to be disruptive, and people tend to hate net outages
.
(Personal data spirits Sids have are likely to be demons in Modern, really, thanks to the Infernal's influence on the setting.)
Eh, i just like the idea of Sidereals going in and dropping legal documents or kung fu directly on programs rather than using anything so declasse as a keyboard.
While I can understand this, there's the pretty significant problem of treating programs as spirits in Modern. Namely, it supposed to be a modern setting. Our programs here are not generally even remotely thinking beings (unlike Heavens Reach, which can take the AI=spirits angle and run with it). Any sort of computer spirit/AI should be a fairly rare and unusual thing, so you can have a recognizable modern computer network. Admittedly, Exalts traffic in such beings as a matter of course.
Beyond that, Sidereal Bureaucracy themes don't really allow for hacking. It more has the theme of ending disputes. Occult works better for Heavens Reach, given its sub theme of manipulating spirits (and I don't mean making them do what you want, I mean physically changing them in some way). Again, not good for actual hacking. Sid Investigation (with it theme of having an automaton pull information out of thin air) works really well. (Seriously, these are the trapping for the Key, Investigations linked college: Innovation, hubris, automata and mechanical devices, books, libraries, medicine, curiosity. It fits ridiculously well.)
Sidereal hacking given the whole kung-fu thing they have going on should totally be 'summon up a representation of what you want and beat it up until it tells you what you want.' Obviously these charms are in War, as in 'cyberwarfare.'
Actually, no. Sid War is... actually kind of a terrible set of charms from the perspective of having a weird theme and running with it. Which is to say, it doesn't have a weird theme: its just War, vaguely Sidereal flavored. Given the War set was generated wholesale for 2e (seeing as War didn't exist in 1e) this is not really surprising, but it is annoying.
(You could probably do what you suggest as an Astrology Charm of the Mask though.)
So, if I already have the three charms in the Elegant Dance of Bow and Blade series, are those redundant with Shining General Puissance?
Dawn King's Strife lets you cross-apply Dawn caste Excellencies, and Shining General Puissance is from Thousand Correct Actions. It "[allows] use of War Excellencies to enhance attack and defense actions as though they were Excellencies for the appropriate Ability while commanding a Magnitude 3+ unit."
Its War keyworded, so only if you use Mass Combat. Thus as a general rule, Shining General Puissance is a trap purchase you should not make, because you will almost never use it.
(And even if you do use Mass Combat, there are probably going to be times when you aren't going to have 75+ guys backing you up, and it just stops working.)